Various xkcd Math Valentines

Over the years, xkcd has had some good Valentine’s day comics. Ranked from my favorite to least favorite, they are:

** Note: Some posts on Math-Fail are user-submitted and NOT verified by the admin of the site before publication. If you find this post to be distasteful, non-math related, ?or something worse?, then definitely leave a comment letting me know. Thanks very much! Mike **